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Beijing Spake Technology Co., Ltd is the most professional manufacturer of calibration instruments in China with 19 years' experience. We are manufacturing and selling digital pressure gauge, pressure calibrator, pressure calibration pump, pressure comparator, process and temperature calibrators. "SPMK" brand calibrators have been exported over 30 countries and enjoys very good reputation. We will continue providing good calibration products and service to more and more SPMK users worldwide.